Green’s Dictionary of Slang

sappho n.

[proper name Sappho (c.600 BC), the poetess of the island of Lesbos]

a lesbian.

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[UK] [title] Sappho-An.
[Aus]W.A. Sun. Times (Perth) 7 Apr. 1/1: The house in question is the domicile of Saphos [sic] and Trilbys.
[US]G. Legman ‘Lang. of Homosexuality’ Appendix VII in Henry Sex Variants.
[US](con. 1960s) M. Kingston Tripmaster Monkey 78: Pseudo psycho lesbo sappho weirdo hetero homo combos.

In derivatives

sapphic (adj.)

a code-word to describe female homosexuality.

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[UK]‘Walter’ My Secret Life (1966) VI 1211: It is more than probably that she had Sapphic tastes, as well as lechery for men.
[US]Broadway Brevities Dec 18: [of a woman's love letters to a man] Come hither, children, if you're weak on reading cataclysmic cachinnations of amour, if you've a yen for the red-hot lava of passion, for sizzling, Sapphic serenades of Desire.
[US]Lait & Mortimer USA Confidential 42: The Sapphic lover, unless she goes to the extremes of wearing mannish habiliments and cutting her hair short, is seldom obvious.
[US]E. Weiner Drop Dead, My Lovely (2005) 189: Their Sapphic entanglement, the love that dare not speak its maiden name.

In compounds